This 4-Phase 28mm geared reducer stepper motor, model 28BYJ48, is tailored for bathroom applications with its 12V voltage and 1:64 reduction ratio. Designed to thrive in the humid environment of bathrooms, it combines compact 28mm sizing with reliable performance, making it ideal for toilet lid lifters, automatic soap dispensers, and other smart bathroom devices.​

The 1:64 reduction ratio ensures precise, slow-speed movement—critical for smooth operation in bathroom fixtures where gentle motion is key. As a 4-phase stepper motor, it delivers consistent torque to handle repetitive tasks, while the geared reducer structure enhances durability, even with frequent use.​

Whether integrating into new bathroom automation systems or upgrading existing setups, this 28BYJ48 motor offers a perfect blend of size, power, and precision, specifically optimized for the unique demands of bathroom environments.​

We provide customization service on gear ratio, coil resistance, phase number, and connector types.

Customers can customize motor’s parameter based on specific requirement, we have 16:1 to 64:1 gear ratio for option.

Customization options:

Model No.: 28BYJ48

Step angle:(1-2phase driving) 5.625°/64; (2-2 phase driving) 11.25°/step

Gear ratio: 16:1 / 37:1 / 64:1

Customizable items:

Voltage:5~24V; gear ratio, gear material, output shaft, motor’s cap design customizable

Voltage (V)	Resistance (Ω)	Pull-in torque 100PPS (mN*m)	Detent Torque (mN*m)	Unload pull-in Frequency (PPS)
5	60	≥29.4	≥29.4	≥500
12	130	≥44.1	≥29.4	≥500
12	200	≥34.3	≥29.4	≥500

Design drawing(Unit:mm)

Technical Features

Application Highlights

HVAC/R Valve Actuation Winding possibilities – Bipolar

Office Automation Printers, Copiers, Data storage Maintenance free - motor is brushless

Medical Applications Pill dispensing Analysers Cost effective - compact design, lower integration cost

Other Industries & Applications Robotics Digitally controlled - Easy to use with a micro processor

Telecommunication Antennae positioning Switching lines Open loop control - No encoders necessary

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